Includes one Husqvarna BLi22 (40V Battery) Lithium Ion Battery for Husqvarna Power Tools INTERCHANGEABLE BATTERY SYSTEM: The 40 Volt lithium battery fits all Husqvarna battery tools, our lithium-ion batteries are durable, easy to swap and recharge quickly ACTIVE COOLING TECHNOLOGY: 144Wh Li-Ion battery provides consistent power and longer battery life LED CHARGE LIGHTS: Husqvarna batteries feature an easy-to-read intuitive 3-LED charge and battery life indicator 4 AMP HOURS: The Li-ion battery provides 4 Ah (Amp Hours) of power and top-class performance for Husqvarna power tools LONG-LASTING PERFORMANCE: Rechargeable up to 600 times